RAM Preview – Not in real-time

Community Beginner ,
Jun 29, 2016 Jun 29, 2016

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Hello.

I'm having a hard time dealing with this new Preview in AE. A lot of times it is not giving me a real-time playback.

It is nice to have the preview continuously playing while making some changes on the comp, but sometimes I would like to have a real-time preview, like the old RAM preview.

Is it possible to generate a real-time RAM preview? I don't mind waiting for AE to render before playing back the animation.

I have tried the Numpad 0 and also spacebar. I've tried to purge all, restart machine, etc...

Thanks in advance.

Best,

Andre Arruda

After Effects 2015.3 (13.8.0.144)

Mac Pro (Late 2013)

3.5 GHz 6-Core Intel Xeon E5

64 GB 1866 MHz DDR3 ECC

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correct answers 1 Correct answer

Community Beginner , Sep 22, 2017 Sep 22, 2017
Changing the monitor to 60Hz solved the problem here =]

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Adobe Community Professional ,
Jun 29, 2016 Jun 29, 2016

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Pull your Preview panel down so you can see all of the options. Switch the preview shortcut dropdown to the Num 0 option and check to make sure it has the Cache before playback option checked. That should make it behave similar to the old RAM preview.

If you have a preview cached and it's not playing those cached frames back in real time, there's a bug.

One thing to try.

Make your timeline smaller. I'm assuming you're working on a 4K or 5K screen. Shrink your timeline panel vertically so it takes up a lot less screen space and try again.

If that doesn't help, try pressing ` to make your comp window fill the screen and try it.

If that doesn't help, try putting another panel (such as the libraries panel) underneath the timeline.

Please let us know your results.

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Community Beginner ,
Feb 22, 2018 Feb 22, 2018

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I only have to use After Effects once in a blue moon and just encountered this non-real time audio playback on a fully cached ram preview issue today.  (FWIW I'm on Mac 10.12.6 and AE CC 2018)  I spent quite some time Googling a solution and finally ran across the bit posted here about putting the libraries panel under the timeline.  That fixed it.  Wait. WHAT!?!?!  Are you kidding me that in 2018 After Effects cannot successfully perform a cache to ram and playback with audio in sync without the user having to do something as bizarre are rearranging the user interface?!?!? 

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Contributor ,
Feb 22, 2018 Feb 22, 2018

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Yes and it is since CC 2015...

Moreover the panel under the timeline doesn't really fix the bug it works sometimes and sometimes not.

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Community Beginner ,
Feb 22, 2018 Feb 22, 2018

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Indeed.  I spoke a tad too soon.  I now see that it takes a combination of the libraries panel and minimizing the timeline and neither is 100% reliable.  Absolutely ridiculous.

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Contributor ,
Feb 22, 2018 Feb 22, 2018

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The only thing that works 100% is to shrink the AE windows to above 60% of its full screen size and the Ram preview fps becomes sudenly real time all the time.

Or you can tell it this way: to make AE work on a 4k monitor you have to shrink its size to a 2k monitor size... brillant.

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New Here ,
Jun 20, 2020 Jun 20, 2020

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This did the trick for me. Pulling the library under the timeline.

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Community Beginner ,
Jun 29, 2016 Jun 29, 2016

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Szalam​ thanks for your reply.

It seams to be a bug indeed. The checkbox "cache Before Playback" is checked.

Putting the libraries panel under the timeline did help a lot but I'm still having some playback under real-time (27/28 out of 30fps).

Thanks for ur help!

U28D590 Display
27.5-inch (3840 x 2160)

AMD FirePro D700 6144 MB graphics

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Adobe Community Professional ,
Jun 29, 2016 Jun 29, 2016

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So none of the other two suggestions worked, huh? Interesting.

Please, please, please file a bug report and give them as much information as you can (including what you've tried and what worked). This is one of those really persistent bugs introduced by this new architecture that the Adobe people need more help squashing.

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Participant ,
Jul 14, 2016 Jul 14, 2016

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I have the same problem here. Video preview was weird. Now that I'm previewing with an audio track I can definitely say that the preview is not realtime. Sometimes it doubles the frame, sometimes goes slower or faster. The audio sounds distorted and jumpy.

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Adobe Community Professional ,
Jul 14, 2016 Jul 14, 2016

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Zulkifar2 wrote:

I have the same problem here. 

Did you try any of the things I suggested? If so, which ones and what were the results?

What exact version number of AE are you using?

What version number of your OS?

Please describe your computer hardware.

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Contributor ,
Sep 08, 2016 Sep 08, 2016

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Same here, I wonder when this would be fixed.

I'm using iMac 5K Late 2015. Latest AE & Mac as right now. Upgrading to 32GB RAM from 8GB not helping though.

Tried submit bug report but when I submit there's error messages.

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Contributor ,
Nov 03, 2016 Nov 03, 2016

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Still the same problem here even after the new updates. Cache Before Playback is on. Can't preview 4 seconds without distortions. I'm on a Mac Pro with SierraOS.

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Adobe Community Professional ,
Nov 10, 2016 Nov 10, 2016

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Davide Boscolo wrote:

Still the same problem here even after the new updates. Cache Before Playback is on. Can't preview 4 seconds without distortions. I'm on a Mac Pro with SierraOS.

That's got to be really frustrating. My Mac doesn't have the issue, but that's because it's a 15-inch MacBook Pro from 2011, so I don't have a huge screen resolution. I'm sure this is a high-priority issue for the AE team at Adobe as it's affecting so many people. They've done a few things to fix the issue for some people (it's not nearly as much of an issue in the CC 2017 release as it was in the first CC 2015 release), but the main issue is still a problem it would seem.

Hopefully they are close to a proper, real fix. They know it's a widespread issue that frustrates a lot of people, but it's taking a while to nail down the underlying cause. If you haven't yet, you could file a bug report. Give them as much technical information as you can about your system and the problem you're experiencing (but try to keep emotion out of it - I know it's frustrating and they know it's frustrating, so let's  just try to get it solved )..

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Explorer ,
Jul 28, 2016 Jul 28, 2016

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The green bar used to mean a rock-solid assurance that this cached content will play back right now. It now isn't worth the pixels it's displayed in.

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Community Beginner ,
Aug 18, 2016 Aug 18, 2016

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Hello, so now its for me also time to get into the discussion because I have the exact same issues with the RAM Preview.

What I tried and what helps to get around this:

- making the timelinewindow smaller, so its just some layers high

- moving the rendered workarea out of the timeline view

If I see the timeline in "normal" size and the rendered work area, it makes also a lot of these vertical lines which look like coming from the current time indicator.

My system is a Z800 Win10 PC with latest AE 13.8.1.38 running. AND I am working with a two 4K Monitor Setup, while Windows scales 125%.

Another "strange" behavior while RAM Preview is, that during the glitchy playback, the Disk Cache is creating a lot of workload on my Media Stripeset, which I would not really expect because it should play out of the RAM? Shouldnt it?

Maybe I also should file in a bug report...

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Community Beginner ,
Sep 19, 2016 Sep 19, 2016

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I have a simple animation which shouldn't be any problems at all to preview but even if I cache the preview, lover my timeline, add a panel beneath it it still previews in 9-15fps with a quarter resolution. This is insane! I need to render out my animation to see it in real time! Unacceptable! My impression is that it's better to install AE 2014 and work in that. The AE CC has had this problem all along!

I using a late 2015 iMac 27" 5K Retina

4GHz Intel core i7

32GB of RAM

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Contributor ,
Sep 20, 2016 Sep 20, 2016

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for now best you can do is shrink the timeline as Szalam​ said:

Make your timeline smaller. I'm assuming you're working on a 4K or 5K screen. Shrink your timeline panel vertically so it takes up a lot less screen space and try again.

If that doesn't help, try pressing ` to make your comp window fill the screen and try it.

If that doesn't help, try putting another panel (such as the libraries panel) underneath the timeline.

The last one work for me (putting another panel underneath)

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Community Beginner ,
Sep 20, 2016 Sep 20, 2016

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Shrinking timeline seems to improve it. But I hope someone fixes this. I'm on a 5k iMac - I shouldn't be having this problem!

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Contributor ,
Sep 20, 2016 Sep 20, 2016

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True.

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Explorer ,
Nov 14, 2016 Nov 14, 2016

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Change the timeline to a Stacked Panel.  It should playback in realtime now.

Screen Shot 2016-11-14 at 6.38.28 PM.png

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Community Beginner ,
Nov 15, 2016 Nov 15, 2016

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That is so wierd! It did work for me though but how can that be an issue if its stacked or not?

Anyway thanks a lot!

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Adobe Community Professional ,
Nov 15, 2016 Nov 15, 2016

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PerryPride wrote:

That is so wierd! It did work for me though but how can that be an issue if its stacked or not?

Here's a simplified answer: Mac 10.11 changed how redraw rectangles are calculated when they intersect the region at the bottom of the application window between the rounded corners, which forced After Effects to invalidate how it was re-drawing the timeline and then draw a much bigger region than expected, which slowed down the refresh rate during previews. So, doing odd things with the UI fixes it in some cases (like docking a panel underneath.)

Hopefully a proper fix from Adobe comes so workarounds like this aren't needed.

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Community Beginner ,
Nov 15, 2016 Nov 15, 2016

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What about the Windows version? Still the same Preview Issues here, also with CC 2017!

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Adobe Community Professional ,
Nov 15, 2016 Nov 15, 2016

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Bernhard Naether wrote:

What about the Windows version? Still the same Preview Issues here, also with CC 2017!

If you are having issues with this on Windows, it may be similar symptoms, but it's an entirely different cause. I've heard only one or two other people on Windows with a similar issue. You should create a new thread (since it's a different problem) and share as much information as you can about your system. It's a very rare problem, so it's probably going to require a good bit of troubleshooting to find the cause.

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